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Hebei Hankai radial shaft seals
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The importance of a well-functioning hub grease seal cannot be overstated. In vehicles, for instance, they are crucial in maintaining the health of wheel bearings, preventing brake dust and road debris from entering and compromising the lubrication In vehicles, for instance, they are crucial in maintaining the health of wheel bearings, preventing brake dust and road debris from entering and compromising the lubrication
In vehicles, for instance, they are crucial in maintaining the health of wheel bearings, preventing brake dust and road debris from entering and compromising the lubrication In vehicles, for instance, they are crucial in maintaining the health of wheel bearings, preventing brake dust and road debris from entering and compromising the lubrication
hub grease seal. In industrial machinery, they protect critical components from harsh environments, ensuring uninterrupted operation and minimizing maintenance downtime.


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The percentage of an oil seal refers to its ability to effectively prevent leakage. A higher percentage indicates a better sealing capacity, with 100% being the ideal value. However, in reality, achieving a perfect seal is often challenging. Therefore, oil seals with percentages ranging from 25% to 35% are commonly used in applications where a high level of sealing performance is required.
In addition to preventing oil leakage, oil seals also help to extend the lifespan of bearings, gears, and other moving parts by providing lubrication and minimizing friction. Without a proper oil seal, oil could leak out and cause damage to the machinery, leading to costly repairs and downtime

25x38x7 oil seal.

25x38x7 oil seal.